public void Value(RawProtobufValue value)
{
this.WriteHeader(this.FieldIndex, value.Storage);
switch (value.Storage)
{
case RawProtobufWireType.Fixed32:
this.buffer.WriteByte((byte)((value.Number >> 0) & 255));
this.buffer.WriteByte((byte)((value.Number >> 8) & 255));
this.buffer.WriteByte((byte)((value.Number >> 16) & 255));
this.buffer.WriteByte((byte)((value.Number >> 24) & 255));
break;
case RawProtobufWireType.Fixed64:
this.buffer.WriteByte((byte)((value.Number >> 0) & 255));
this.buffer.WriteByte((byte)((value.Number >> 8) & 255));
this.buffer.WriteByte((byte)((value.Number >> 16) & 255));
this.buffer.WriteByte((byte)((value.Number >> 24) & 255));
this.buffer.WriteByte((byte)((value.Number >> 32) & 255));
this.buffer.WriteByte((byte)((value.Number >> 40) & 255));
this.buffer.WriteByte((byte)((value.Number >> 48) & 255));
this.buffer.WriteByte((byte)((value.Number >> 56) & 255));
break;
case RawProtobufWireType.String:
var buffer = Encoding.UTF8.GetBytes(value.String);
this.WriteVarInt(buffer.Length);
this.buffer.Write(buffer, 0, buffer.Length);
break;
case RawProtobufWireType.VarInt:
// See: https://developers.google.com/protocol-buffers/docs/encoding
var number = this.noZigZagEncoding ? value.Number : (value.Number << 1) ^ (value.Number >> 31);
this.WriteVarInt(number);
break;
}
}
public bool TryReadValue(out RawProtobufValue value)
{
switch (this.fieldType.GetValueOrDefault())
{
case RawProtobufWireType.Fixed32:
var fixed32 = 0;
fixed32 += this.stream.ReadByte();
fixed32 += this.stream.ReadByte() << 8;
fixed32 += this.stream.ReadByte() << 16;
fixed32 += this.stream.ReadByte() << 24;
value = new RawProtobufValue(fixed32, RawProtobufWireType.Fixed32);
this.position += 4;
return(true);
case RawProtobufWireType.Fixed64:
var fixed64 = 0L;
fixed64 += this.stream.ReadByte();
fixed64 += (long)this.stream.ReadByte() << 8;
fixed64 += (long)this.stream.ReadByte() << 16;
fixed64 += (long)this.stream.ReadByte() << 24;
fixed64 += (long)this.stream.ReadByte() << 32;
fixed64 += (long)this.stream.ReadByte() << 40;
fixed64 += (long)this.stream.ReadByte() << 48;
fixed64 += (long)this.stream.ReadByte() << 56;
this.position += 8;
value = new RawProtobufValue(fixed64, RawProtobufWireType.Fixed64);
return(true);
case RawProtobufWireType.String:
var length = (int)this.ReadVarInt();
if (length > ReaderState.StringMaxLength)
{
this.Error($"string field exceeds maximum length of {ReaderState.StringMaxLength}");
value = default;
return(false);
}
var buffer = new byte[length];
if (this.stream.Read(buffer, 0, length) != length)
{
this.Error($"could not read string of length {length}");
value = default;
return(false);
}
this.position += length;
value = new RawProtobufValue(Encoding.UTF8.GetString(buffer), RawProtobufWireType.String);
return(true);
case RawProtobufWireType.VarInt:
var varint = this.ReadVarInt();
// See: https://developers.google.com/protocol-buffers/docs/encoding
var number = this.noZigZagEncoding ? varint : -(varint & 1) ^ (varint >> 1);
value = new RawProtobufValue(number, RawProtobufWireType.VarInt);
return(true);
default:
this.Error($"unsupported wire type {this.fieldType}");
value = default;
return(false);
}
}
